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Lesson Plan

Compare two fractions with different numerators and different denominators by using set models

teaches Common Core State Standards CCSS.Math.Content.4.NF.A.2
teaches Common Core State Standards CCSS.Math.Practice.MP3
teaches Common Core State Standards CCSS.Math.Practice.MP5
teaches Common Core State Standards CCSS.Math.Practice.MP7
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Big Ideas: Fractions can be compared by comparing them to a benchmark fraction. Fractions can be compared by creating common denominators or common numerators. This lesson builds on grade 3 work of comparing two fractions with the same numerator or the same denominator by reasoning about their size. The task asks students to compare the number of "blue stars" seen by two characters. Solutions are shown both for using a benchmark fraction and for using common denominators. This lesson builds towards more complex work with adding, subtracting, and multiplying fractions later in grade 4. Vocabulary: fraction, equivalent, numerator, denominator, compare, comparison symbols (, =), greater than, less than, equal to, benchmark fraction
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